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Diagnosis Procedure

Regarding Wiring Diagram information, refer to [PREMIUM AUDIO SYSTEM: WIRING DIAGRAM [CREW CAB] ].

DIAGNOSIS PROCEDURE

Step Action YES NO
1  SPEAKER HARNESS CHECK 
  1. Disconnect audio amp. connector B158 and subwoofer connector B72.
G06445618G06445619G06445620Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.

  1. 2. Check continuity between audio amp. harness connector B158 (A) and subwoofer harness connector B72 (B).
G06445618G06445619G06445620Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.

  1. 3. Check continuity between audio amp. harness connector B158 (A) and ground.
G06445618G06445619G06445620Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.

Are the continuity test results as specified? 		 GO TO 2
  • Check connector housings for disconnected or loose terminals.
  • Repair harness or connector.
2  SPEAKER SIGNAL CHECK 
  1. Connect audio amp. connector B158 and subwoofer connector B72.
G06445621G06445622Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.

  1. 2. Turn ignition switch to ACC.
  2. 3. Push "POWER" switch.
  3. 4. Check the signal between audio amp. harness connector B158 terminals with SDT or oscilloscope.
G06445621G06445622Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.

Is the audio signal voltage as specified? 		 Replace subwoofer. Refer to [SUBWOOFER: REMOVAL AND INSTALLATION ]. GO TO 3
3  PRE-AMP HARNESS CHECK 
  1. Disconnect audio unit connector M66 and audio amp. connector B159.
G06445623G06445624G06445625Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.

  1. 2. Check continuity between audio unit harness connector M66 (A) and audio amp. harness connector B159 (B).
G06445623G06445624G06445625Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.

  1. 3. Check continuity between audio unit harness connector M66 (A) and ground.
G06445623G06445624G06445625Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.

Are the continuity test results as specified? 		 GO TO 4
  • Check connector housings for disconnected or loose terminals.
  • Repair harness or connector.
4  PRE-AMP SIGNAL CHECK 
  1. Connect audio unit connector M66 and audio amp. connector B159.
G06445626G06445627Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.

  1. 2. Turn ignition switch to ACC.
  2. 3. Push "POWER" switch.
  3. 4. Check the signal between audio unit harness connector M66 terminals with SDT or oscilloscope.
G06445626G06445627Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.

Is the audio signal voltage reading as specified? 		 Replace audio amp. Refer to [AUDIO AMP: REMOVAL AND INSTALLATION ]. Replace audio unit. Refer to [AUDIO UNIT: REMOVAL AND INSTALLATION ].
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